@article{8023bfb0878f4cf8850bed8478b77f27,
title = "High-Efficiency Indoor Organic Photovoltaics with a Band-Aligned Interlayer",
abstract = "The emergence of indoor electronic devices for internet of things (IoT) has motivated the scientific community to develop photovoltaic devices that can efficiently convert indoor light into electricity. In this paper, we report high-efficiency non-fullerene organic photovoltaic (OPV) cells with over 30% power conversion efficiency (PCE) under indoor conditions. Our results show that the choice of electron-transporting layer (ETL) is critically important to enable such performance. The use of an ETL (named PDI-NO) with a deep highest occupied molecular orbital (HOMO) level can effectively suppress leakage current and reduce trap-assisted recombination of the devices. Thus, using this ETL, we achieve record PCE of 31% by utilizing a low-band-gap acceptor in the bulk-heterojunction (BHJ) blend. Whereas, in another case, by employing a large-band-gap acceptor, a PCE of 26.7% with over 1V is achieved. Our study paves the way toward high-performance indoor OPV devices for powering IoT electronics.",
keywords = "electron transport interlayer, ETL, high efficiency OPV, indoor organic solar cell, indoor solar cell, internet of things, IoT, organic solar cell, OSC, polymer solar cells",
author = "Ma, {Lik Kuen} and Yuzhong Chen and Chow, {Philip C.Y.} and Guangye Zhang and Jiachen Huang and Chao Ma and Jianquan Zhang and Hang Yin and {Hong Cheung}, {Andy Man} and Wong, {Kam Sing} and So, {Shu Kong} and He Yan",
note = "Funding Information: The work described in this paper was partially supported by the Shen Zhen Technology and Innovation Commission (project number JCYJ20170413173814007 , JCYJ20170818113905024 ), the Hong Kong Research Grants Council (Research Impact Fund R6021-18 , project numbers 16305915 , 16322416 , 606012 , and 16303917 ), Guangdong Major Project of Basic and Applied Basic Research (no. 2019B 030302007 ), and Hong Kong Innovation and Technology Commission through projects ITC-CNERC14SC01 and ITS/471/18 . H. Yin and S.K.S. would like to acknowledge supports from HKBU under grant # RC-ICRS/15-16/4A-SSK . C.M. and K.S.W. would like to acknowledge support from RGC of Hong Kong under grant # AoE/P-02/12 . Funding Information: The work described in this paper was partially supported by the Shen Zhen Technology and Innovation Commission (project number JCYJ20170413173814007, JCYJ20170818113905024), the Hong Kong Research Grants Council (Research Impact Fund R6021-18, project numbers 16305915, 16322416, 606012, and 16303917), Guangdong Major Project of Basic and Applied Basic Research (no. 2019B 030302007), and Hong Kong Innovation and Technology Commission through projects ITC-CNERC14SC01 and ITS/471/18. H. Yin and S.K.S. would like to acknowledge supports from HKBU under grant #RC-ICRS/15-16/4A-SSK. C.M. and K.S.W. would like to acknowledge support from RGC of Hong Kong under grant # AoE/P-02/12. L.-K.M. conceived the idea, designed the experiments, set up the experimental equipment, and performed the device fabrication, data collection, and analysis; L.-K.M. P.C.Y.C. and H. Yan wrote the original draft; Y.C. synthesized Y6-O; J.H. and A.M.H.C. synthesized P3TEA; J.Z. synthesized FTTB:PDI4; J.H. C.M. and H. Yin performed device measurement and data collection. P.C.Y.C. G.Z. K.S.W. S.K.S. and H. Yan provided academic instruction to this work. H. Yan directed the project. The authors declare no competing interests.",
year = "2020",
month = jul,
day = "15",
doi = "10.1016/j.joule.2020.05.010",
language = "English",
volume = "4",
pages = "1486--1500",
journal = "Joule",
issn = "2542-4351",
publisher = "Cell Press",
number = "7",
}
